Anodizing under sparking of AZ31B magnesium alloy in Na3PO 4 electrolyte

被引：10

作者：

Asoh H. ^{[1
]}

Matsuoka S. ^{[1
]}

Ayama H.S. ^{[1
]}

Ono S. ^{[1
]}

机构：

[1] Department of Applied Chemistry, Faculty of Engineering, Kogakuin University, Hachioji-shi, Tokyo 192-0015

来源：

Keikinzoku/Journal of Japan Institute of Light Metals | 2010年 / 60卷 / 11期

关键词：

Anodic film; Anodizing; AZ31B magnesium alloy; Corrosion resistance; Sparking;

D O I：

10.2464/jilm.60.608

中图分类号：

学科分类号：

摘要：

The microstructures and corrosion resistance of the anodic oxide films formed on AZ31B magnesium alloy by anodizing under continuous sparking in alkaline phosphate electrolyte (Na3PO4) were investigated. Basically, voltage-current characteristic of AZ31B in Na3PO 4 solution was the same to that obtained in other sodium salt electrolytes such as Na2SiO3 and NaAlO2. However, the anodic films formed in Na3PO4 solution exhibited the higher corrosion resistance than that of the films formed in other electrolytes because of the incorporation of substantial amount of magnesium phosphate. The microstructures (e.g., diameter and number of pores) of the anodic films formed under sparking accompanied by current or voltage oscillation and gas evolution were strongly affected by the degree of sparking such as size, number, and appearance frequency, not by the formation voltage itself. X-Ray diffraction analysis revealed the incorporation of crystalline Mg3 (PO4)2 into the anodic film formed under the sparking condition of dielectric breakdown.

引用

页码：608 / 614

页数：6

共 9 条

[1]

Cai Q., Wang L., Wei B., Liu Q., Surf. Coat. Technol., 200, (2006)

[2]

Arrbal R., Matykina E., Viejo F., Skeldon P., Thompson G.E., Corros. Sci., 50, (2008)

[3]

Ono S., Asami K., Osaka T., Masuko N., J. Electrochem. Soc., 143, (1996)

[4]

Ono S., Metall. Sci. and Technolo., 16, (1998)

[5]

Ono S., Masuko N., Materials Science Forum., 419-422, (2003)

[6]

Ono S., Kijima H., Masuko N., Materials Transactions, 44, (2003)

[7]

Ono S., Suzuki Y., Asoh H., Hanzawa N., Hyakutake M., Materials Science Forum., 426-432, (2003)

[8]

Asoh H., Ono S., Materials Science Forum., 419-422, (2003)

[9]

Lunder O., Nordlien J.H., Nisancioglu K., Corrosion Reviews, 15, (1997)

← 1 →